http://ir4.rutgers.edu/ornamental/ornamentalprojectinformationsheets.cfm Page 1 of 6 Project Name: Pre EmergentHerbicide Safety - Dithiopyr New Ongoing X Completed Duration if ongoing or completed: 2004-2017 Project Description: The Pre-Emergent Herbicide Safety Project began in 2004 and has continued through 2017. While specific crops and herbicides have changed, the intent of this research has been to screen over-the-top applications of pre-emergent herbicides as plants are breaking dormancy, or beginning new growth, and then 4 to 6 weeks later once foliage is more mature. This research project sheet covers dithiopyr based formulations (,, Dimension WSP). Research Project Abstract (if available): Abstract from 2014 Dithiopyr Safety Summary Dimension was initially registered in 1992 for ornamental horticulture uses. This initial label contained an extensive list of ornamental horticulture plants in landscapes where Dimension could be used without causing phytotoxicity. From 1992 through 2004, IR-4 conducted 68 trials on 42 species / genera, including several different fern species grown in field containers, to contribute crop safety data for dithiopyr formulations. In 2006, the new label contained registered uses for field container and in ground nursery production, the first dithiopyr product to have these use sites. A revised label was published in 2015 adding more crop species to the label. During 2014 to 2016, IR-4 conducted 206 trials with formulation on 108 species / genera, including ornamental grasses to further expand the treatable plant list in the current label. Of the researched crops and Dimension formulations, only four crops (Hemerocallis sp., Muhlenbergia capillaris, Pennisetum alopecuroides and Pseudotsuga mensiezii) can be added at this time based on the data provided here. It is recommended the trials conducted using emulsifiable concentrate formulations be repeated with. Target Species (Phytotoxicity, or common and Latin name of arthropod, pathogen, weed): Safety Target s (list tested crops if ongoing or completed project) See IR-4 Safety to Date below Target Product(s)(list tested products or numbered compounds if ongoing or completed project) Product Registration and Research Status Registration Status Labeled & Commercialized Wide range of ornamental horticulture crops listed Labeled & Commercialized Opportunity to add additional ornamental horticulture crops Labeled But NOT Commercialized Not yet registered or labeled No longer available for development * IR-4 Data contributed to registration decision either adding pest to label or not pursuing further research 1 At least one crop species screened fully 2 Product not available for production ornamentals Creation Date: 7/23/2015 Last Saved Date: 9/21/2017
http://ir4.rutgers.edu/ornamental/ornamentalprojectinformationsheets.cfm Page 2 of 6 Area Characteristic Pro Con Availability & effectiveness of alternative Label is currently for directed application on x management tools most crops. Wide range of crops already listed on the label x Damage potential of target Performance and crop safety of proposed products (from other systems) Compatibility with IPM, resistance management programs Economics Geographic distribution Manufacturer interest in labeling products Other 2015 Comments: : Products tested primarily liquids, may add some of the granulars back into the protocol from 2012/2013. Rank products during protocol development IR-4 Safety Trials to Date Average rating on a scale of 1 5 with 1 = 0 to about no injury and 5 = severe injury and mortality; minimum to maximum rating; number of trials. A rating of 3 or higher is considered commercially unacceptable (red text). A rating of 1 or 2 is considered commercially acceptable and those with more than 3 trials are complete (green text). Labeled indicates that IR-4 generated data in at least one trial and that this crop is listed on the label. For crop/product combinations that are blank, IR-4 has not screened this combination. Creation Date: 7/23/2015 Last Saved Date: 9/21/2017
Page 3 of 6 Table 1. Broadleaf Evergreen Tree/Shrub Black Chokeberry (Aronia melanocarpa) 3.0 (3-3) n1 Broadleaf Evergreen Tree/Shrub Gum (Eucalyptus sp.) 1.0 (1-1) n3 Broadleaf Evergreen Tree/Shrub Wintercreeper (Euonymus fortunei) 1.3 (1-2) n3 Broadleaf Evergreen Tree/Shrub Holly, Chinese (Ilex cornuta) 2.0 (1-3) n2 Broadleaf Evergreen Tree/Shrub Holly, Japanese (Ilex crenata) 1.3 (1-2) n3 Broadleaf Evergreen Tree/Shrub Holly, Topal (Ilex x attenuata) 2.5 (2-3) n2 Broadleaf Evergreen Tree/Shrub Holly, Blue (Ilex x meserveae) 2.3 (1-3) n4 Broadleaf Evergreen Tree/Shrub Wax Myrtle (Myrica cerifera) 2.5 (2-3) n2 Broadleaf Evergreen Tree/Shrub Japanese Andromeda, Japanese Pieris (Pieris japonica) Broadleaf Evergreen Tree/Shrub Azalea, & Rhododendron (Rhododendron sp.) 1.0 (1-1) n1 Broadleaf Evergreen Tree/Shrub Rhododendron (Rhododendron sp.) 2.3 (2-3) n3 Broadleaf Evergreen/Deciduous Cotoneaster, cranberry Tree/Shrub (Cotoneaster apiculatus) 3.0 (3-3) n2 Broadleaf Evergreen/Deciduous Tree/Shrub Privet, Glossy (Ligustrum lucidum) 1.0 (1-1) n1 Bulbs & Corms Sweet Flag (Acorus sp.) 2.0 (1-3) n3 Bulbs & Corms Daylily (Hemerocallis sp.) Labeled 1.5 (1-2) n4 1.0 (1-1) n2 Bulbs & Corms Iris (Iris sp.) 1.5 (0-3) n4 Bulbs & Corms Daffodil (Narcissus sp.) 1.3 (0-2) n4 Bulbs & Corms Tulip (Tulipa sp.) 1.5 (0-3) n4 Sedum hybridum (Phedimus hybridus) moss Stonecrop (Sedum acre) Stonecrop (Sedum kamtschaticum) 2.5 (1-4) n2 gray stonecrop (Sedum pachyclados) Jenny's Stonecrop (Sedum reflexum) Tasteless Stonecrop (Sedum sexamgulare)
Page 4 of 6 Maple, Norway (Acer platanoides) 1.0 (1-1) n1 Maple, Silver (Acer saccharinum) 2.0 (2-2) n1 Japanese Barberry (Berberis thunbergii) 2.0 (1-3) n4 Red Bud, Eastern (Cercis canadensis) 3.0 (3-3) n1 Dogwood, Flowering (Cornus florida) 3.5 (3-4) n2 Dogwood, Gray (Cornus racemosa) 5.0 (5-5) n1 Dogwood, Red Osier (Cornus sericea) 2.5 (2-3) n2 Hawthorn (Crataegus sp.) 1.0 (1-1) n1 Enkianthus (Enkianthus sp.) Burning Bush (Euonymus alatus) 1.5 (1-2) n2 Rose-Of-Sharon (Hibiscus syriacus) 1.7 (1-2) n3 Hydrangea (Hydrangea sp.) 3.0 (2-4) n4 1.0 (1-1) n1 Ninebark (Physocarpus sp.) 3.0 (3-3) n2 Plane Tree, Sycamore (Platanus sp.) 1.0 (1-1) n1 Cherry, Black (Non-Bearing) (Prunus serotina) Oak (Quercus sp.) 2.3 (1-4) n3 Rose (Rosa sp.) Labeled Japanese Meadowsweet (Spiraea japonica) 3.5 (3-4) n4 Lilac (Syringa sp.) 2.0 (1-3) n2 Elm, Chinese (Ulmus parvifolia) 1.0 (1-1) n1 Fern Sprenger's Asparagus Fern (Asparagus densiflorus) 1.7 (1-2) n3 Hardy Ground Cover Foliage Broom Sedge Bluestem (Andropogon virginicus) 2.7 (2-3) n3 Hardy Ground Cover Foliage Delosperma (Delosperma sp.) 1.0 (1-1) n2 Hardy Ground Cover Foliage Lantana (Lantana sp.) Labeled Herbaceous Flowering Plant Rosemallow (Hibiscus sp.) 2.5 (1-4) n4 Herbaceous Flowering Plant Rose moss (Portulaca grandiflora) 2.5 (1-4) n4
Page 5 of 6 Herbaceous Flowering Plant Scarlet Sage (Salvia splendens) Directed 1.0 (1-1) n1 Herbaceous Flowering Plant Scarlet Sage (Salvia splendens) Herbaceous Flowering Plant Speedwell, Brooklime (Veronica sp.) 2.0 (2-2) n1 Herbaceous Flowering Plant - Annual Begonia (Begonia sp.) 2.0 (2-2) n1 3.7 (2-5) n3 Herbaceous Flowering Plant - Annual Ornamental Cabbage/Kale (Brassica oleracea) Herbaceous Flowering Plant - Annual Touch-me-not (Impatiens sp.) 3.0 (3-3) n1 Herbaceous Flowering Plant - Perennial Bluestar (Amsonia sp.) 2.0 (1-3) n2 Herbaceous Flowering Plant - Perennial Chrysanthemum, Garden (Chrysanthemum/Dendranthema 2.0 (2-2) n1 sp.) Herbaceous Flowering Plant - Perennial Purple Coneflower (Echinacea sp.) 3.0 (3-3) n2 Herbaceous Flowering Plant - Perennial Beeblossom, Lindheimer's (Gaura lindheimeri) 2.0 (1-3) n2 Herbaceous Flowering Plant - Perennial Hellebore, Black (Helleborus niger) 2.0 (2-2) n1 Herbaceous Flowering Plant - Perennial Plantain Lily (Hosta sp.) 2.3 (2-3) n3 Herbaceous Flowering Plant - Perennial Max Chrysanthemum (Leucanthemum maximum) 2.0 (2-2) n1 Herbaceous Flowering Plant - Perennial Cardinal Flower (Lobelia cardinalis) Directed 1.0 (1-1) n1 Herbaceous Flowering Plant - Perennial Cardinal Flower (Lobelia cardinalis) 3.0 (2-4) n2 Herbaceous Flowering Plant - Perennial Peony (Paeonia sp.) 3.5 (3-4) n2 Narrowleaf Evergreen Tree/Shrub Fir, Fraser (Abies fraseri) 1.0 (1-1) n2 Narrowleaf Evergreen Tree/Shrub Bougainvillea (Bougainvillea sp.) 1.0 (1-1) n1 Narrowleaf Evergreen Tree/Shrub Juniper (Juniperus sp.) 1.0 (1-1) n1 Narrowleaf Evergreen Tree/Shrub Cedar, Eastern Red (Juniperus virginiana) 1.5 (1-2) n2 Narrowleaf Evergreen Tree/Shrub Spruce, Norway (Picea abies) 1.7 (1-3) n3 Narrowleaf Evergreen Tree/Shrub Spruce, White; Cat (Picea glauca) 1.7 (1-3) n3 Narrowleaf Evergreen Tree/Shrub Pine (Pinus sp.) 1.0 (1-1) n5 Narrowleaf Evergreen Tree/Shrub Pine, Loblolly (Pinus taeda) 1.0 (1-1) n1 Narrowleaf Evergreen Tree/Shrub Fir, Douglas (Pseudotsuga menziesii) 1.0 (1-1) n4 Narrowleaf Evergreen Tree/Shrub Bald Cypress (Taxodium distichum) 1.0 (1-1) n1
Page 6 of 6 Narrowleaf Evergreen Tree/Shrub American Arborvitae (Thuja occidentalis) 1.0 (1-1) n4 Palm Washington Fan Palm (Washingtonia robusta) 1.0 (1-1) n1 Turf Blue Fescue (Festuca cinerea) 1.5 (1-2) n2 Unknown Distylium sp. (Distylium sp.)